collective

of, as, or characteristic of a group; of or by all or many of the individuals in a group acting together: the collective effort of the students

designating or of any enterprise in which people work together as a group, esp. under a system of collectivism: a collective farm

Gram.

designating a noun which is singular in form but denotes a collection of individuals (e.g., army, orchestra, crowd): it is treated as singular when the collection is thought of as a whole and as plural when the individual members are thought of as acting separately

designating a prefix which denotes a collecting or a collection

Origin of collective

Middle English and Old French collectif from Classical Latin collectivus